多元混合工质池核沸腾传热实验研究_孙兆虎.pdfVIP

27 1 Vol . 27, No. 1 2006 2 Feb. 2006 ( 100084) ( 100080) R134a( C H ) ( iC H ) 3 8 4 10 , 0. 1~ 0. 6MPa, , , ; ; ; ; ; Experiment St udy of Pool Boiling Heat Transfer of Multicomponent Mixed- refrigerants Sun Zhaohu , Gong Maoqiong, Li Zhijian and Wu Jianfeng Tsinghua University, Beijing, 100084, China Abstract Heat transfer coefficients in nucleate oiling on a smooth flat surface were measured for pure fluids of R- 134a, propane, iso utene, and their inary and ternary mixtures at different pressures from0. 1 to 0. 6 MPa. Series of experiments with different heat flux and mixture concentrations were conducted. Compared with the pure components, inary mixtures show lower heat transfer coefficients. This reduction was more o vious at the high heat flux. Several heat transfer correlations were o tained for pure refrigerants and multicomponent mixed- refrigerants. Keywords Pyrology; Pool oiling; Pure refrigerant; Mulitcomponent mixed- refrigerants; Heat transfer coefficient; Correlation; , , 1 , , 2 80K ~ 230K [ 1] 2. 1 , 1 J- T( - ) , 159mm, 600mm; 25mm, 200mm; 100 , , , , 0. 16MPa , , ,